Charge transport studies in fluorene - Dithieno[3,2-b:2′,3′-d]pyrrole oligomer using time-of-flight photoconductivity method

Manoj Parameswaran; Ganapathy Balaji; Tan Mein Jin; Chellappan Vijila; Sajini Vadukumpully; Fu Rong ZHU; Suresh Valiyaveettil

doi:10.1016/j.orgel.2009.08.022

Charge transport studies in fluorene - Dithieno[3,2-b:2′,3′-d]pyrrole oligomer using time-of-flight photoconductivity method

Manoj Parameswaran, Ganapathy Balaji, Tan Mein Jin, Chellappan Vijila, Sajini Vadukumpully, Fu Rong ZHU, Suresh Valiyaveettil^*

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Journal article › peer-review

19 Citations (Scopus)

Abstract

Charge mobility characteristics of a newly synthesised 2,6-bis[2-(9,9-dihexyl-9H-fluorene)]-N-(4-hexylphenyl)-dithieno[3,2-b:2 ′,3′-d]pyrrole oligomer (DTP-FLU) was studied as a function of electric field and temperature using time-of-flight photoconductivity measurement. It is found that the DTP-FLU oligomer is a hole transporting material with a hole mobility of 7.7 × 10^-6 cm²/Vs at an applied electric field of 2.9 × 10⁵ V/cm at 298 K. The dependence of hole mobility with applied electric field and temperature is studied in detail by analyzing the experimental results using the Bassler's Gaussian disorder model and Correlated disorder model. The energetic disorder parameter (σ) = 100 meV, mobility pre-factor (μ_∞) = 6.1 × 10^-4 cm²/Vs and positional disorder parameter (Σ) = 2.4 were extracted using Gaussian disorder model. The film morphology and photophysical properties of this new oligomer are also studied in detail.

Original language	English
Pages (from-to)	1534-1540
Number of pages	7
Journal	Organic Electronics
Volume	10
Issue number	8
DOIs	https://doi.org/10.1016/j.orgel.2009.08.022
Publication status	Published - Dec 2009

Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Biomaterials
General Chemistry
Condensed Matter Physics
Materials Chemistry
Electrical and Electronic Engineering

User-Defined Keywords

Charge transport
Correlated disorder model
Dithienopyrrole
Gaussian disorder model
Time-of-flight

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10.1016/j.orgel.2009.08.022

Cite this

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title = "Charge transport studies in fluorene - Dithieno[3,2-b:2′,3′-d]pyrrole oligomer using time-of-flight photoconductivity method",

abstract = "Charge mobility characteristics of a newly synthesised 2,6-bis[2-(9,9-dihexyl-9H-fluorene)]-N-(4-hexylphenyl)-dithieno[3,2-b:2 ′,3′-d]pyrrole oligomer (DTP-FLU) was studied as a function of electric field and temperature using time-of-flight photoconductivity measurement. It is found that the DTP-FLU oligomer is a hole transporting material with a hole mobility of 7.7 × 10-6 cm2/Vs at an applied electric field of 2.9 × 105 V/cm at 298 K. The dependence of hole mobility with applied electric field and temperature is studied in detail by analyzing the experimental results using the Bassler's Gaussian disorder model and Correlated disorder model. The energetic disorder parameter (σ) = 100 meV, mobility pre-factor (μ∞) = 6.1 × 10-4 cm2/Vs and positional disorder parameter (Σ) = 2.4 were extracted using Gaussian disorder model. The film morphology and photophysical properties of this new oligomer are also studied in detail.",

keywords = "Charge transport, Correlated disorder model, Dithienopyrrole, Gaussian disorder model, Time-of-flight",

author = "Manoj Parameswaran and Ganapathy Balaji and Jin, {Tan Mein} and Chellappan Vijila and Sajini Vadukumpully and ZHU, {Fu Rong} and Suresh Valiyaveettil",

note = "Funding Information: The authors would like to thank Agency for Science, Technology and Research (A∗STAR), National University of Singapore (NUS), NUS-Nanoscience and Nanotechnology Initiative (NUSNNI) for financial support. Department of Chemistry, NUS and Institute of Materials Research and Engineering (IMRE) are acknowledged for technical support and Mr. Surani b Dolmanan for the technical assistance for solid state quantum yield measurements.",

year = "2009",

month = dec,

doi = "10.1016/j.orgel.2009.08.022",

language = "English",

volume = "10",

pages = "1534--1540",

journal = "Organic Electronics",

issn = "1566-1199",

publisher = "Elsevier BV",

number = "8",

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TY - JOUR

T1 - Charge transport studies in fluorene - Dithieno[3,2-b:2′,3′-d]pyrrole oligomer using time-of-flight photoconductivity method

AU - Parameswaran, Manoj

AU - Balaji, Ganapathy

AU - Jin, Tan Mein

AU - Vijila, Chellappan

AU - Vadukumpully, Sajini

AU - ZHU, Fu Rong

AU - Valiyaveettil, Suresh

N1 - Funding Information: The authors would like to thank Agency for Science, Technology and Research (A∗STAR), National University of Singapore (NUS), NUS-Nanoscience and Nanotechnology Initiative (NUSNNI) for financial support. Department of Chemistry, NUS and Institute of Materials Research and Engineering (IMRE) are acknowledged for technical support and Mr. Surani b Dolmanan for the technical assistance for solid state quantum yield measurements.

PY - 2009/12

Y1 - 2009/12

N2 - Charge mobility characteristics of a newly synthesised 2,6-bis[2-(9,9-dihexyl-9H-fluorene)]-N-(4-hexylphenyl)-dithieno[3,2-b:2 ′,3′-d]pyrrole oligomer (DTP-FLU) was studied as a function of electric field and temperature using time-of-flight photoconductivity measurement. It is found that the DTP-FLU oligomer is a hole transporting material with a hole mobility of 7.7 × 10-6 cm2/Vs at an applied electric field of 2.9 × 105 V/cm at 298 K. The dependence of hole mobility with applied electric field and temperature is studied in detail by analyzing the experimental results using the Bassler's Gaussian disorder model and Correlated disorder model. The energetic disorder parameter (σ) = 100 meV, mobility pre-factor (μ∞) = 6.1 × 10-4 cm2/Vs and positional disorder parameter (Σ) = 2.4 were extracted using Gaussian disorder model. The film morphology and photophysical properties of this new oligomer are also studied in detail.

AB - Charge mobility characteristics of a newly synthesised 2,6-bis[2-(9,9-dihexyl-9H-fluorene)]-N-(4-hexylphenyl)-dithieno[3,2-b:2 ′,3′-d]pyrrole oligomer (DTP-FLU) was studied as a function of electric field and temperature using time-of-flight photoconductivity measurement. It is found that the DTP-FLU oligomer is a hole transporting material with a hole mobility of 7.7 × 10-6 cm2/Vs at an applied electric field of 2.9 × 105 V/cm at 298 K. The dependence of hole mobility with applied electric field and temperature is studied in detail by analyzing the experimental results using the Bassler's Gaussian disorder model and Correlated disorder model. The energetic disorder parameter (σ) = 100 meV, mobility pre-factor (μ∞) = 6.1 × 10-4 cm2/Vs and positional disorder parameter (Σ) = 2.4 were extracted using Gaussian disorder model. The film morphology and photophysical properties of this new oligomer are also studied in detail.

KW - Charge transport

KW - Correlated disorder model

KW - Dithienopyrrole

KW - Gaussian disorder model

KW - Time-of-flight

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DO - 10.1016/j.orgel.2009.08.022

M3 - Journal article

AN - SCOPUS:72149092255

SN - 1566-1199

VL - 10

SP - 1534

EP - 1540

JO - Organic Electronics

JF - Organic Electronics

IS - 8

ER -

Charge transport studies in fluorene - Dithieno[3,2-b:2′,3′-d]pyrrole oligomer using time-of-flight photoconductivity method

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